Posts: 12
Threads: 4
Joined: Jan 1970
HP made such a product called the external charger. I was a small package just larger than the Classic battery pack and the normal 82002A charger plugged into a connector on the bottom just like the ones on the calculators. i've seen acouple recently on ebay for auction but I do not know the number of the item. The Museum likely has it on the collector listing of items. I think the last time I looked it said very hard to find, but I see them every once in a while on ebay as I said. Work nicely if you have two battery packs you can charge one and use the other in your calculator. I have one that I use all the time. The only strange thing about the external charge is that it does not have any HP part numbers on it. Only marking is the normal HP label on the front just like a calculator Logo plate.
I think making the plugs for these chargers would not be very difficult but the only thing is how to identify the pin sockets they used on the originals. So far I have not found the right size. anyone know what these were originally AMP's or another?